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#ifndef MEMORYMANAGER_HPP_
#define MEMORYMANAGER_HPP_

#include <vector>

namespace nyu {

class HeapObject;
class MemoryManager {
public:
    HeapObject* allocate(size_t size);

    void minorGC();
    void majorGC();

    static MemoryManager& getInstance();

    size_t getTotalAllocated() const {
        return total_allocated_;
    }

    void resetTotalAllocated() {
        total_allocated_ = 0;
    }

    std::vector<void*>::size_type getAllocatedChunks() const {
        return chunks_.size();
    }

    size_t countAlivedObjects() const;

    void addDestructQueue(HeapObject* p);
    void destructObjects();

    size_t getMinorGCCount() const {
        return minor_gc_count_;
    }

    void resetMinorGCCount() {
        minor_gc_count_ = 0;
    }

    size_t getMajorGCCount() const {
        return major_gc_count_;
    }

    void resetMajorGCCount() {
        major_gc_count_ = 0;
    }

private:
    MemoryManager();
    ~MemoryManager();

    MemoryManager(const MemoryManager& rhs);
    MemoryManager& operator=(const MemoryManager& rhs);

    std::vector<void*> chunks_;
    HeapObject* free_block_;
    HeapObject* heap_object_;

    size_t total_allocated_;

    HeapObject* destruct_queue_;
    HeapObject* destruct_queue_last_;

    size_t minor_gc_count_;
    size_t major_gc_count_;
};

}

#endif /* MEMORYMANAGER_HPP_ */
